Suppose 8 people want to communicate with each other using public key encryption. The communication between any pair of them is
1 answer:
Answer:
The answer is "64"
Explanation:
There has been 1 Private Key 1 Public Key for every person. The private key is used for other app messages. All else uses the Public Key to encrypt messages with that user. Those keys are numerically related. Even if you have 5 users, you will be given 5 Personal keys and 5 Public keys.
- All user will have a duplicate of other public keys, which indicates (n*n-1) copies of n public keys on different systems to make sure shared contact between all users, plus n private keys.
- The unique key count is 2n, with n^2 distributed private and public keys on different systems.
- 8 people, where 8 is a number, that is equal to n so,
You might be interested in
Answer:
Explanation:
The python code for the question is attached in the image below.
The objective here is to write a code in python with a function called has_duplicates that takes a string parameter and returns True if the string has any repeated characters. Otherwise, it should return False.
SEE BELOW FOR THE CODE.
alphabet = "abcdefghijklmnopqrstuvwxyz"
test_dups = ["zzz","dog","bookkeeper","subdermatoglyphic","subdermatoglyphics"]
test_miss = ["zzz","subdermatoglyphic","the quick brown fox jumps over the lazy dog"]
def histogram(s):
d = dict()
for c in s:
if c not in d:
d[c]=1
else:
d[c] += 1
return d
def has_duplicates():
for string in test_dups:
dictionary=histogram(string)
duplicates=False
for ch in dictionary.keys():
if dictionary[ch] > 1:
duplicates=True
break
if duplicates==True:
print(string,"has duplicates")
else:
print(string,"has no duplicates")
def missing_letters(string):
answer=""
for ch in alphabet:
if ch not in string:
answer=answer+ch
return answer
print("__________________________________________")
print(" Calling has_duplicates() function")
print("__________________________________________")
has_duplicates()
print("\n______________________________________________")
print("Calling missing_letters() function in for loop")
print("______________________________________________")
for i in test_miss:
answer=missing_letters(i)
if len(answer)>=1:
print(i,"is missing letters",answer)
else:
print(i,"uses all the letters")
